Theft alarm



Feb 14 1928. 1,658,848

s. M. KALIKOW THEFT ALARM Filed Feb. 1926 Fatented Feta, 14, t?

lED STATES PATENT OFFICE,

THEFT ALARM.

Application filed February 8, 1926. Serial No. 88,900.

This invention relates to theft alarms, and the object thereof is'to provide a device of this character especially adapted for the protection of stores, lofts,- banks, and prifi vate homes, and is so constructed that an alarm may be given at any time, regardless of where the operator may be.

Another object is to so construct such an alarm that it is always prepared to be op- 1c erated upon, durin business hours by the lawful occupants o the premises, and during ni ht time'by the unlawful entrance of a burg am With the foregoing and other objects in View, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter disclosed and claimed, it being understood that 2% the changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings:--

Figure 1 represents a view of my invention in the shape of a floor mat.

-Figure 2 is a view of a door showing lock plunger in door jamb.

Figure 3 represents a shoe of a lawful operator with a steel pin attached to the lower outboard side of heel.

In. the embodiment illustrated, the theft alarm constituting this invention is shown in the shape of a mat upon the floor, and comprises member 1, composed of sheet metal, member 2 is composed of a plurality of ertorations in a springy insulating material, member 3 same as member 1, member 4.- is-a sheet of insulating material, member 5 is the same asmembers 1. and 3.

From. the above description it will be obvious that this theft alarm consists of live (5) main members, l-2-3-4.-- and 5, and that member 3 being directly connected by A to negative terminal oi? battery 16, member 5 connected by B to alarm box ill and switch 6 resting in rear of 12 of Figure 2,

in the use this theft alarm for protectiou during business hours, the operator,

when threatened by a bandit, needs only to turn his ankle slighdy, so that steel pin 9.

sheet metal, the other two of said members attached to heel of shoe 14 penetrate through members 5-4 and need only touch 3 causing instant contact, and is sufiicient to actuate alarm box 11. v

' When premises are locked for the night, lock plunger 13 of Figure 2 entering in locking engagement with 12, forcing switch lever 6 to make contact with terminal 7 connected to member 1 by C which automatically transforms the apparatus into a night alarm as well as a day alarm. Any person placing his weight upon the apparatus when in this position will cause the parts I of member 3 covering the perforations of member 2 to sag downward, thereby touching member 1 and making contact. When door is unlocked, lock plunger 13 releasin spring switch lever 6 from terminal 7, and, when in this position, the lawful occu ant of the premises may walk upon the t eft alarm without causing an alarm.

From the foregoing description taken in connection with the accompanying drawings, the advantages or" the construction and the method of operation will be readily apparent to those skilled in the art in which this invention appertains, and while 1 have described the principle of the operation of the invention together with the device that It now consider to be the best embodiment thereof, I. desire to have it understood that the device shown is merely illustrative and that such changes may be made as within 5 the scope of the claimed invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

A combined hold up and burglar alarm for stores and the like comprising in combination a floor mat composed of at least five superimposed members, the upper middle and lowermost of said members being of being of insulating material, the lowermost of the latter two having cut out portions therein, at least the three uppermost mem here being flexible, the two uppermostnicer hers being readily penetrable a source of 18$ current, an alarm device, a lock cperat d c "e switch, a hold up circuit including sai source, alarm device and the up er-- most metal. members, burglar circuit Q messes including said source, alarm device, switch when said lock switch is closed by a weight and the two lowermost metal members and on the mat sufficient to'cause the middle a penetrating metal point adapted to be 2111- member to sag through the cutaway por- 1 tached to the foot of a person whereby said tions in the lowermost insulating member 5 first circuit may be closed by the piercing of and contact with the lowermost member.

two uppermost members by said penetrating point, and said second circuit may be closed, SAMUEL M. KALIKOW. 

